<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        table {
            border-collapse: collapse;
            width: 40%;

        }

        th,
        td {
            border: 1px solid #ddd;
            /* 1px灰色细边框 */
            padding: 8px;
            text-align: center;
            font-size: 10px;
        }

        .center
        {
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100%;
        }

    </style>

</head>

<body style="height: 100vh;margin: 0;padding: 0;">

    <div class="center">
        <table>
            <thead>
                <tr>%1</tr>
            </thead>
            <tbody>
                <tr>%2</tr>
            </tbody>
        </table>

    </div>





</body>

</html>